LOL. *applies universal tool to random Japanese game and gets instant English!*

...no, there is no universal tool. There are various extracting (and packing) tools for the more common visual novel engines (and their related data storage types), but there are also games that require tools to be made for them.

Just like how many of those FPS you play were based on the QUAKE engine (Quake, Half-Life, etc.), many of the VNs run on engines like NScripter (modification is called ONScripter) and KiriKiri. The former is free to use for commercial use, the latter is available under the GNU General Public License. The ONScripter clone of NScripter is free software.

Sad...
Generally, i want to translate that game(not to english, though ^_^). I understand the structure of *.AFS archive, but what next...
And then I try to run debugger along with game, it(game) say, that I must go by forest and that's all.